活化酯
Primary or secondary amino groups are ubiquitous in biomolecules. They are present in proteins and peptides as ε-amino groups of lysines and N-terminal amino groups. Many natural and synthetic small molecules are amines, and DNAs with amino groups can be prepared by solid phase synthesis, and enzymatically.
Amino groups can be modified by acylation with various activated carbonyl compounds. Among these compounds, activated N-hydroxysuccinimide esters are most suitable for biolabeling and bioconjugation applications.
Compared to other activated esters, NHS derivatives possess good stability in aqueous environment. Optimal pH for the coupling of amines with NHS esters in aqueous buffers is 8.3-8.5. Labeling is also possible in organic solvents. Polar aprotic solents, such as DMF or DMSO, are preferred. One equivalent of tertiary amine base, such as triethylamine, or diisopropylethylamine (DIPEA) is necessary to achieve efficient amine acylation in non-aqueous solution.
(5,6)-FAM diacetate NHS ester
Amine-reactive fluorescein (FAM) derivative, a mixture of 5- and 6-isomers. The reagent becomes brightly green fluorescent once it is hydrolyzed while diffusing into cells. A fluorescent tracer.貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
2934-1mg | 1 mg | – | 現貨 | |
2934-25mg | 25 mg | $160 | 現貨 | |
2934-50mg | 50 mg | $270 | 現貨 | |
2934-100mg | 100 mg |
$520
|
現貨 |
AF 343(香豆素)-X-NHS 酯 (AF 343 (Coumarin)-X-NHS ester)
AF 343(香豆素)是一種藍光發射染料,可用作螢光素 (FAM) 的 FRET 供體。該結構的特點是香豆素 343 螢光團和官能團之間有一個連接體。它提供了更好的溶解性以及螢光團和官能團之間的空間分離。貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
12620 | 1 mg | $110 | 現貨 | |
22620 | 5 mg | $210 | 現貨 | |
42620 | 25 mg |
$410
|
現貨 | |
52620 | 50 mg |
$695
|
現貨 | |
62620 | 100 mg |
$1190
|
現貨 |
AF 430 NHS ester
AF 430 is a hydrophilic coumarin dye with emission in the green-yellow range. The NHS ester is used for the labeling of amine groups.貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
10820 | 1 mg | $110 | 現貨 | |
20820 | 5 mg | $165 | 現貨 | |
40820 | 25 mg | $380 | 現貨 | |
50820 | 50 mg |
$695
|
現貨 | |
60820 | 100 mg |
$1190
|
現貨 |
AF 488 NHS 酯 (AF 488 NHS ester)
AF 488 NHS 酯,一種明亮、光穩定、親水性的綠色通道熒光染料。貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
11820 | 1 mg | $125 | 現貨 | |
21820 | 5 mg | $325 | 現貨 | |
31820 | 10 mg |
$480
|
現貨 | |
41820 | 25 mg |
$950
|
現貨 | |
51820 | 50 mg |
$1625
|
現貨 | |
61820 | 100 mg |
$2090
|
現貨 |
AF 488 TFP 酯 (AF 488 TFP ester)
綠色螢光染料 AF 488 的四氟苯酯,用於標記蛋白質、多肽和修飾寡核苷酸中的氨基。貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
118T0 | 1 mg | $165 | 現貨 | |
218T0 | 5 mg |
$510
|
現貨 | |
418T0 | 25 mg |
$1650
|
現貨 |
AF 532 NHS 酯 (AF 532 NHS ester)
AF 532 染料的 NHS 酯,通過與氨基反應標記蛋白質、多肽和修飾寡核苷酸。貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
1C820 | 1 mg | $140 | 現貨 | |
2C820 | 5 mg |
$450
|
現貨 | |
4C820 | 25 mg |
$1460
|
現貨 | |
5C820 | 50 mg |
$1890
|
現貨 | |
6C820 | 100 mg |
$2640
|
現貨 |
AF 555 NHS ester
AF 555 NHS ester, a bright, photostable, and hydrophilic fluorescent dye for the yellow channel.貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
1K820 | 1 mg | $140 | 現貨 | |
2K820 | 5 mg |
$450
|
現貨 | |
4K820 | 25 mg |
$1460
|
現貨 | |
5K820 | 50 mg |
$1890
|
現貨 | |
6K820 | 100 mg |
$2640
|
現貨 |
AF 568 NHS ester
AF 568 derivative for labeling proteins and other high- and low-molecular weight ligands with free amines.貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
14820 | 1 mg | $125 | 現貨 | |
24820 | 5 mg | $325 | 現貨 | |
44820 | 25 mg |
$720
|
現貨 | |
54820 | 50 mg |
$1325
|
現貨 | |
64820 | 100 mg |
$2090
|
現貨 |
AF 594 NHS酯 (AF 594 NHS ester)
AF 594 染料的紅色螢光 NHS-酯,用於標記蛋白質、肽、抗體和任何含有 -NH2 基團的分子。純5-異構體貨號 | 數量 | 價格 | 交貨時間 | 購買此產品 |
---|---|---|---|---|
2825-1mg | 1 mg | $125 | 現貨 | |
2825-5mg | 5 mg |
$425
|
現貨 | |
2825-25mg | 25 mg |
$1240
|
現貨 | |
2825-50mg | 50 mg |
$1890
|
現貨 | |
2825-100mg | 100 mg |
$2640
|
現貨 |